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| | Abstract | | 3-D finite difference simulation of ground motion, which requires large resources of computation, is one of the key techniques for a seismic hazard evaluation. To solve the problem of heavy computational expense, we have introduced GPGPU, General purpose computing on graphics processing units, which is the technique of using a GPU to perform computation in applications traditionally handled by the CPU. Aoi et al. have showed a high performance of simulation on GPU by using simple 3-D finite difference model with homogeneous grid. In this study, we apply this technique to the GMS, Ground Motion Simulator, which is a practical tool for wave propagation simulation using discontinuous grid and show that the computation time on a GPU is reduced to 1/31.6 compared with one on a CPU. |
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